Reach out to a loan broker with your exact info and the exact or at least type of property you want to buy and they should have options and opinions. 

This works well if it's an MTR or STR type situation and you are in control of the lock.

In this type of situation, they want low interest rate with low down payment also.

What made you interested in investing in this type of deal?

Look at Homes.com or Realtor.com to get an idea what that type of property is selling for (look at the ones Pending or Under Contract)...or, look in the county's GIS system to see what similar properties sold for.Once you have an idea what a fair market value would be, let the landlord (if they're interested in selling) mention their price. 

New construction, fully decked out on the design and amenities. purchase price 785K, 40K in seller credits, 120-140k gross rental projections What made you interested in investing in this type of deal?

If the answer is no, that means they are a broker of some type.

Are there specific factors you look for in an area to make sure it’s a good fit for this type of rental setup?

I've found that when I try finding other deal types or other business models or niches, I end up losing a ton of valuable time that goes nowhere. 

I use credit cards, write checks, and pay in cash.Each situation can dictate the payment type.